feat: add mfa types - OKTA-343852

[shuowu]

This change adds one level depth types for class AuthTransaction.

[codecov-io]

Codecov Report

Merging #554 (d13665f) into master (d82e99b) will decrease coverage by 1.13%.
The diff coverage is 84.05%.

@@            Coverage Diff             @@
##           master     #554      +/-   ##
==========================================
- Coverage   92.60%   91.47%   -1.14%     
==========================================
  Files          37       37              
  Lines        2070     2123      +53     
  Branches      420      439      +19     
==========================================
+ Hits         1917     1942      +25     
- Misses        153      181      +28     

Impacted Files	Coverage Δ
lib/tx/TransactionState.ts	100.00% <ø> (ø)
lib/browser/browser.ts	90.62% <31.25%> (-4.57%)	⬇️
lib/TokenManager.ts	96.68% <75.00%> (-1.27%)	⬇️
lib/token.ts	93.43% <88.65%> (-2.95%)	⬇️
lib/AuthStateManager.ts	91.75% <100.00%> (ø)
lib/constants.ts	100.00% <100.00%> (ø)
lib/tx/AuthTransaction.ts	91.34% <100.00%> (ø)
lib/types/Token.ts	100.00% <100.00%> (ø)

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[shuowu]